In the first station we had to rub a balloon against someone's clothes or hair. Then we put the balloon over paper and foil. The foil and paper stuck to the balloon. I think this is because the static electricity charged the balloon positively or negatively and the paper and foil had the opposite charge which made them attract.
In the second station we stuck two pieces of tape on the table and then ripped them off. When they were put near each other they repelled. This meant the had the same electric charge. I think this is because the same material had the same things done to them so they were bound to have the same electrical charge.
In the third station we had to fold a little of an end of two strips of tape and stick them on top of each other. Then we ripped them apart. When they were put near each other they attracted which means they had opposite electrical charges. I think this is because the friction from the rip caused one strip to get more neutrons and the other to get more electrons.
In the fourth station we had to wet a balloon and then dry it off. After that we had to rub it against a piece of clothing and see what would happen if we put it near running water from a sink. When this was done, the water and the balloon attracted each other so the water looked like it was bending. This means that the balloon and water had opposite charges (one negative and positive). I think this means that the balloon started neutral and then it lost or gained neutrons or protons which made it negatively or positively charged.
Questions
What exactly is an atom?
What is the difference between a cell and an atom?
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